ERR_NGROK_7138: The OAuth Client Secret exceeds the maximum length of MAX, got SIZE

What does ERR_NGROK_7138 mean?

ngrok returns ERR_NGROK_7138 with this message:

The OAuth Client Secret exceeds the maximum length of <MAX>, got <SIZE>.

Troubleshoot ERR_NGROK_7138 with your AI agent. Connect it to the ngrok MCP server, then ask what caused the error and how to fix it.

Email support@ngrok.com and include the error code.